Steam-generator for heating purposes



Patented March 13, 1866.

I. E. CRAIG.

Steam Generator.

l l I IlNirnn STATES PATENT OFFICE.

ISAAC E. CRAIG, OF CLEVELAND, OHIO.

STEAM-GENERATOR FOR HEATING PURPOSES.

Specification forming part of Letters Patent No. 53,11, dated March 13, 1866.

`I do hereby declare that the following is a full and complete description ot' the construction and operation ot the same, reference being had to the accompanying' drawings, making a part of this specication, in which- Figure l is a perspective view of the generator'. Fig. 2 is a transverse vertical section. Fig. 3 is a longitudinal vertical section.

Like letters of reference refer to like parts in the different. views.

My improvement relates to a steam-generator consisting of a series ot plates so constructed and arranged that water-chambers and ilues are formed alternating with each other, and the line-plates form stays or supports for the sides of the water-chambers, in which a large amount of fire-surface is obtained, combining cheapness and strength of construction with economyin the use of fuel.

A represents the dome ot' the generator, underneath which are arranged a series of plates, that can be square, rectangular', or any other desired shape. They are represented square in the drawings, and are secured together by clamps b above and below at each end, or by bolts a, extending through them, or rivets can be used.

The water-chambers B B are formed ot square cast frames, B", as shown and indicated by the dotted lines in Fig. 3, the sides C of which are iliade of plate or wroughtV metal, that are placed on the frames and fastened at the ends by being turned over onto the edges of the frame with a cap, `D', on the outside, secured by bolts, as shown in Fig. 1, forming a water and steam tightjoint, or a tight joint maybe made in any other way.

A tight, close jointis formed at the upper and lower ends by the edges being clamped or screwed tightly between the upper and lower portion ofthe frame and the correspondiilig part,'d, of the adjacent plates, as shown in Fig. 2, or by any other suitable means.

The tine-plates D, between the water-chambers, are' cast with ribs e, projecting on each side, forming rectangular openings fwhen in place between the sides of the chambers.

F F are the outside plates of the generator that form one side of each of the outside chambers, Bf, the inner sides next the tlues only required to be wrought-iron and both sides of the center chamber, B, where there are dues on each side.

The generator is supplied with water in the ordinary manner, and the chambers communicate with the dome either directly or by means of pipes. The dome may be square or round, and is made of cast-iron in two separate pieces, the bottom being placed on the top ot' the plates through which the pipes pass into the water-chambers it' they do not communicate directly. The upper portion of the dome is attached by means ot' flanges and bolts to the plates, as represented in Fig. 1. The ribs ot' the plates fitting closely against the sides C of the chambers form a system ot' supports or stays that strengthen the generator so that the ordinary stay-bolts and bars are not needed, the wrought plates forming the sides ot' the dues next the chambers being so thin that as the tire and heat pass through the tlues a larger amount ot' generated heat will be absorbed than in any other way, thus accomplishing one object of my invention, economy in the use ot' fuel; and it is likewise very cheap in its construction, and will be strong and durable.

There can he any desired number of chambers and flue-plates, alternating with each other according' to the size ot' the generator, the central chambers all having wrought plates on each side, and the outside chambers need them only on the inner sides next the tiues.

What I claim as my improvement, and desire to secure by Letters Patent, is-

1. The line-plates D, forming a system of supports, and tluesf, when arranged between the water-chambers B B', substantially as and for the purpose set forth.

2. One or more water-chambers, B B', when constructed and arranged in relation to each other, and iiue stay-plates D, as and for the purpose set forth.

3. The construction ot the frame Bin combination with the side plates, C, when arranged in the manner and for the purpose set forth.

4 ISAAC E. CRAIG.

Witnesses W. H. BURRIDGE,

A. W. MGCLELLAND. 

